a
    >b { color: red }
a
    > b { color: red }
a
    >b { color: red }
a
    +b { color: red }
a
    + b { color: red }
a
    +b { color: red }
a
    ~b { color: red }
a
    ~ b { color: red }
a
    ~b { color: red }
a
    ~b
    + c
    >d { color: red }
